Back to Coleoptera Checklist

Back to Species Webpage List

Coleoptera of Great Smoky Mountains National Park Species Pages

Family Staphylinidae

            Subfamily Oxyporinae

 Oxyporus (Pseudoxyporus) lateralis Gravenhorst

Description and Taxonomy

Length 7-9mm. The genus belongs to the monotypic subfamily Oxyporinae, a distinctive group of Staphylinidae that are easily recognizable by large, robust bodies, long, sickle-shaped prognathous mandibles, and extremely large, crescent-shaped terminal segments of the labial palpi (Campbell 1969).  The genus is almost worldwide in distribution and contains two subgenera, Oxyporus s. str. and Pseudoxyporus, with three and eight species, respectively, in eastern North America. The subgenus Pseudoxyporus s. str. can be recognized by slightly compressed, relatively narrow antennomeres completely covered by short pubescense (Campbell 1969). This species can be distinguished from the other GSMNP species of this subgenus by the lack of carina at the basal angles of the pronotum and limited development of black areas of body coloration (Campbell 1978).

Life History

All Oxyporus species are mycophagous on various fleshy fungi, both as adult and larval stages. These fungi belong to three orders within the class Hymenomycetes: Agaricales (gilled mushrooms), Boletales (bolete mushrooms) and Polyporales (polypore mushrooms) (Hanley & Goodrich 1995). Females may construct and protect special chambers where the eggs hatch (Newton et al. 2000). This species has a relatively narrow range of hosts, with preference for two fungal genera, representing the so-called 'Pattern 3' of host selection (Hanley & Goodrich 1995).  Specimens from GSMNP were collected using Malaise traps and from undetermined fleshy fungi. Specimens were found from early May to late June at 445-980 m elevations. 

Distribution

Widely distributed in eastern North America, from Michigan and Nova Scotia to Tennessee and North Carolina; not known from the Gulf Coast States (Campbell 1969).

Conservation Concerns

Not under threat.

 

Locality records in GSMNP.

Acknowledgements

Development of these pages was supported by grants from Discover Life in America and the National Science Foundation (DEB-0516311).

References

Campbell, J.M. 1969. A revision of the New World Oxyporinae (Coleoptera: Staphylinidae). Canadian Entomologist 101: 225-268.

Campbell, J.M. 1978. New species of Oxyporus (Coleoptera: Staphylinidae) from North America. Canadian Entomologist 110: 805-813.

Hanley, R.S. & M.A. Goodrich. 1995. Review of mycophagy, host relationships and behavior in the New World Oxyporinae (Coleoptera: Staphylinidae). Coleopterists Bulletin 49: 267-280.

Newton, A.F., M.K. Thayer, J.S. Ashe & D.S. Chandler. 2000. Staphylinidae. Pp. 272-418 in: Arnett, R.H & M.C. Thomas (eds.) American Beetles. Vol. 1. CRC Press, Boca Raton - London - New York - Washington.

 

Posted 7 Feb. 2007, A. K. Tishechkin, Louisiana State Arthropod Museum.

Back to Coleoptera Checklist

Back to Species Webpage List